> In the case of earthquakes, their very unpredictability, the brief period of time avialable in which to make an alert (often only a few seconds, in cases a few minutes) means that manual cross-validation is all but impossible.
For the earthquake alarm there is absolutely no manual intervention. These are automatic alarms exploiting the fact that the speed of light in air is faster than the speed of sound in rock. Earthquakes move approximately 1km/s, so if you are 3km away from the epicenter, you get a maximum of 3 seconds warning. Throw a human in the loop and there's no way they'd respond fast enough.
For the earthquake alarm there is absolutely no manual intervention. These are automatic alarms exploiting the fact that the speed of light in air is faster than the speed of sound in rock. Earthquakes move approximately 1km/s, so if you are 3km away from the epicenter, you get a maximum of 3 seconds warning. Throw a human in the loop and there's no way they'd respond fast enough.